Improved roofing for buildings



UNITED STATES PATENT OFFICE.

LUKE S. MILLS, OF NEW YORK, N. Y., AND CHARLES HART SMITH, OF

BALTIMoEE,

MARYLAND.

Specification forming part of Letters Patent No. 40,542, dated November3, 1863.

To all whom, t may concern:

Be it known that we, LUKE S. MILLS, of the city, county, and State ofNew York, and CHARLES HART SMITH, of Baltimore, in the State ofMaryland, have invented a new and Improved Roofing for Buildings 5 andwe do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference thereon, making a part of thisspecification, in which- Figure l is a sectional view, and Fig. 2 is aview of the top of partiallydinished roof, the finished part extendingas far as is covered by the part marked O C.

The subject of our invention is a roon g composed of an under layer offelt or sheathin g-paper and a top layer of slate, tile, or other rigidsubstance, the two being connected and iirmly held together by anintermediate layer of cement.

In order to enable others skilled in the art to make and use ourinvention, we will describe its construction.

We first cover the boarding of the roof D in Fig. 1 with sheathing-paperor felt, (represented by A,) attaching it to the root in any convenientmanner. The strips of paper or felt should overlap, leaving but onethird of each'exposed. We next take cement, composed of asphalt orcoal-tar, from which its volatile elements have been expelled by boilinger distillation, and having made it fluid by heat spread itevenly overthe paper or felt. While the cement is yet Soft we place upon it slateor tile or any otherl rigid material, bringing the diii'erent piecesnear but not close to each other, and allowing the cement to ll theinterstices. The cement, becoming hard by cooling, iirmly connects thefelt or paper with the rigid material.

We do not claim the manner of laying the felt, nor do we confineourselves to the method above described.

The cement may be' of asphalt, coal-tar, pitch, or any similarsubstance, or petroleum, or of two or more ot' them combined.

The slate or tile is represented in the drawings by O G. In the view ofthe top of the finished part of the roof, the tile or slate only ofcourse are visible.

What we claim as our invention, and desire to secure by Letters Patent,is-

A roofin g composed of a lower layer ot' felt or sheathing-paper and atop layer of some rigid substance, the two being firmly connected by anintermediate layer of cement.

LUKE S. MILLS. OHAS. HART SMITH.

Witnesses to signature of Luke S. Mills:

DAVIS S. LEssEY, CHARLES W. CoMINs. Witnesses to signature Chas. HartSmith:

WM. E. BAITZELL, J. F. WHITE.

